:45
(TCP/UDP)
Low Risk
MPM
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TCP/UDP — System & Infrastructure
Port Overview
Port Number
45
Service Name
MPM
Transport Protocol
TCP/UDP
Category
System & Infrastructure
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 45?
Message Processing Module (receive). Handles the reception portion of the MPM message processing system on ARPANET.
TCP/UDP
System & Infrastructure
Security Considerations
Port 45 (MPM) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.